Justin Ibarra
60 lines
1.8 KiB
TOML
60 lines
1.8 KiB
TOML
[metadata]
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creation_date = "2020/12/22"
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maturity = "production"
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updated_date = "2022/05/04"
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[rule]
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author = ["Elastic"]
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description = """
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The Secure Shell (SSH) authorized_keys file specifies which users are allowed to log into a server using public key
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authentication. Adversaries may modify it to maintain persistence on a victim host by adding their own public key(s).
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"""
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from = "now-9m"
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index = ["auditbeat-*", "logs-endpoint.events.*"]
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language = "kuery"
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license = "Elastic License v2"
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name = "SSH Authorized Keys File Modification"
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risk_score = 47
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rule_id = "2215b8bd-1759-4ffa-8ab8-55c8e6b32e7f"
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severity = "medium"
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tags = ["Elastic", "Host", "Linux", "macOS", "Threat Detection", "Persistence"]
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timestamp_override = "event.ingested"
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type = "query"
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query = '''
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event.category:file and event.type:(change or creation) and
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file.name:("authorized_keys" or "authorized_keys2") and
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not process.executable:
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(/Library/Developer/CommandLineTools/usr/bin/git or
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/usr/local/Cellar/maven/*/libexec/bin/mvn or
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/Library/Java/JavaVirtualMachines/jdk*.jdk/Contents/Home/bin/java or
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/usr/bin/vim or
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/usr/local/Cellar/coreutils/*/bin/gcat or
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/usr/bin/bsdtar or
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/usr/bin/nautilus or
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/usr/bin/scp or
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/usr/bin/touch or
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/var/lib/docker/* or
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/usr/bin/google_guest_agent)
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'''
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1098"
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name = "Account Manipulation"
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reference = "https://attack.mitre.org/techniques/T1098/"
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[[rule.threat.technique.subtechnique]]
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id = "T1098.004"
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name = "SSH Authorized Keys"
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reference = "https://attack.mitre.org/techniques/T1098/004/"
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[rule.threat.tactic]
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id = "TA0003"
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name = "Persistence"
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reference = "https://attack.mitre.org/tactics/TA0003/"
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